CN117480128B - A device and method for recycling wastewater from lithium battery positive electrode processing - Google Patents
A device and method for recycling wastewater from lithium battery positive electrode processingInfo
- Publication number
- CN117480128B CN117480128B CN202380010739.8A CN202380010739A CN117480128B CN 117480128 B CN117480128 B CN 117480128B CN 202380010739 A CN202380010739 A CN 202380010739A CN 117480128 B CN117480128 B CN 117480128B
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- wastewater
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/26—Phosphates
- C01B25/30—Alkali metal phosphates
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/26—Phosphates
- C01B25/32—Phosphates of magnesium, calcium, strontium, or barium
- C01B25/34—Magnesium phosphates
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Inorganic Chemistry (AREA)
- Removal Of Specific Substances (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The application relates to the technical field of recovery treatment of lithium battery anode processing wastewater, and discloses a recovery treatment device and a recovery treatment method of lithium battery anode processing wastewater, wherein the recovery treatment device comprises a collecting unit, a collecting unit and a collecting unit, wherein the collecting unit comprises a first storage tank and a second storage tank, the first storage tank is used for storing phosphorus-containing wastewater, and the second storage tank is used for storing lithium-containing wastewater; the reaction unit comprises a tank body and a filter pressing module, wherein the tank body comprises a reaction chamber and a sedimentation chamber which are communicated, a stirring module is arranged in the reaction chamber, a horizontally arranged packing layer and a vertically arranged partition plate are arranged in the sedimentation chamber, one side of the packing layer is connected with the partition plate, the partition plate and the packing layer divide the sedimentation chamber into an upper area and a lower area, the filter pressing module comprises a diaphragm pump and a filter press, the lower area is communicated with the filter press through the diaphragm pump, and the detection unit comprises a PH meter, a flowmeter and a turbidimeter. The recovery processing device and the recovery processing method can more fully utilize residual substances of the wastewater, and reduce the recovery cost of the wastewater.
Description
Technical Field
The application relates to the technical field of lithium battery anode processing wastewater recovery, in particular to a recovery treatment device and method for lithium battery anode processing wastewater.
Background
On the one hand, iron phosphate is needed to be prepared in the processing process of the anode of the lithium battery, the iron phosphate is usually synthesized by liquid phase reaction of ferrous sulfate, hydrogen peroxide and phosphoric acid under certain conditions, and wastewater with higher phosphorus content is generated in the reaction process and is discharged after being treated by a sewage treatment plant. On the other hand, lithium washing wastewater can be generated in the processing process of the anode of the lithium battery, and the wastewater is subjected to PH value adjustment and then is treated by an MVR evaporator to realize the recovery of lithium resources. Therefore, in the current method for treating the wastewater from the positive electrode processing of the lithium battery, the wastewater containing phosphorus is not effectively utilized, so that the recovery cost is high.
Disclosure of Invention
The application aims to provide a recovery treatment device and a recovery treatment method for lithium battery anode processing wastewater, which can more fully utilize residual substances of the wastewater and reduce the recovery cost of the wastewater.
In order to achieve the above object, according to one aspect, the present application provides a recovery treatment device for lithium battery anode processing wastewater, comprising:
a collection unit including a first storage tank for storing the phosphorus-containing wastewater and a second storage tank for storing the lithium-containing wastewater;
The reaction unit comprises a tank body and a filter pressing module, wherein the tank body comprises a reaction chamber and a sedimentation chamber which are communicated, a stirring module is arranged in the reaction chamber, a horizontally arranged packing layer and a vertically arranged partition plate are arranged in the sedimentation chamber, one side of the packing layer is connected with the partition plate, the partition plate and the packing layer divide the sedimentation chamber into an upper area and a lower area, when wastewater is input into the sedimentation chamber, the wastewater passes through the packing layer from the lower area and then enters the upper area and is discharged;
The detecting unit comprises a PH meter, a flowmeter and a turbidity meter, wherein the PH meter is arranged in the reaction chamber, the flowmeter is provided with two, the PH meter is respectively arranged at the outlet of the first storage tank and the outlet of the second storage tank, and the turbidity meter is arranged in the precipitation chamber.
In some embodiments, the collection unit further comprises a first centrifugal pump and a second centrifugal pump, the first reservoir being in communication with the reaction chamber through the first centrifugal pump, and the second reservoir being in communication with the reaction chamber through the second centrifugal pump.
In some embodiments, the cell body further comprises a first end cap that covers the reaction chamber and a second end cap that covers the settling chamber.
In some embodiments, the stirring module comprises a motor, a helical gear reducer and a stirring paddle which are sequentially connected, wherein the helical gear reducer is installed on the upper portion of the first end cover, and the stirring paddle is arranged on the lower portion of the first end cover.
In some embodiments, a baffle is mounted to an inner wall of the reaction chamber, the baffle surrounding an outer periphery of the stirring paddle.
In some embodiments, the tank further comprises a mud scraping and sucking machine, and the mud scraping and sucking machine is arranged on the second end cover.
In some embodiments, the filler layer is a honeycomb chute filler layer.
In some embodiments, the cell body further comprises a drain chamber in communication with the upper region of the settling chamber, and the detection unit further comprises a level gauge disposed within the drain chamber.
On the other hand, the application provides a recovery treatment method of lithium battery anode processing wastewater, which comprises the following steps:
collecting the phosphorus-containing wastewater through a first storage tank, and collecting the lithium-containing wastewater through a second storage tank;
Starting a first storage tank and a second storage tank to convey the phosphorus-containing wastewater and the lithium-containing wastewater into a reaction chamber of a first reaction unit, starting a stirring module to obtain mixed wastewater, adjusting the pH value of the mixed wastewater to 8-10, flowing into a precipitation chamber of the first reaction unit, filtering by a filler layer in the precipitation chamber, precipitating in the lower region of the precipitation chamber to form magnesium phosphate, and forming filtered wastewater in the upper region of the precipitation chamber;
Starting the upper region of a sedimentation chamber of a first reaction unit to convey filtered wastewater into a reaction chamber of a second reaction unit, starting a stirring module to adjust the pH value of the filtered wastewater to 11-13, flowing into the sedimentation chamber of the second reaction unit, filtering the filtered wastewater by a packing layer in the sedimentation chamber, precipitating the filtered wastewater in the lower region of the sedimentation chamber to form lithium phosphate, and discharging clear water in the upper region of the sedimentation chamber;
And starting diaphragm pumps of the first reaction unit and the second reaction unit to respectively convey magnesium phosphate and lithium phosphate into a filter press, and squeezing to obtain a magnesium phosphate filter cake and a lithium phosphate filter cake.
In some embodiments, the PH adjustment of the mixed wastewater and the filtered wastewater is performed by injecting a liquid base.
The application provides a recovery processing device for lithium battery anode processing wastewater, which has the beneficial effects that compared with the prior art:
The reaction unit comprises a tank body and a filter pressing module, wherein the tank body and the filter pressing module are mixed to react to form a precipitate, and the filter pressing module is used for squeezing to obtain a magnesium phosphate filter cake and a lithium phosphate filter cake, so that materials in the waste water can be effectively recycled, waste water residual substances are more fully utilized, and waste water recycling cost is reduced.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a recovery treatment device for lithium battery anode processing wastewater provided by the embodiment of the application.
Fig. 2 is a schematic diagram of an enlarged cell body structure of a first reaction unit of a recovery treatment device for lithium battery anode processing wastewater according to an embodiment of the present application.
Fig. 3 is an enlarged schematic diagram of a filter pressing module of a recovery treatment device for lithium battery anode processing wastewater according to an embodiment of the application.
Fig. 4 is an enlarged schematic structural diagram of a stirring module of a device for recycling and treating lithium battery anode processing wastewater according to an embodiment of the application.
FIG. 5 shows the mass concentration of lithium ion, magnesium ion and phosphate ion in solution at different pH values.
In the figure, 100 parts of recovery processing device, 1 part of collecting unit, 11 parts of first storage tank, 12 parts of second storage tank, 2 parts of reaction unit, 21 parts of pool body, 210 parts of liquid discharge chamber, 211 parts of reaction chamber, 212 parts of sedimentation chamber, 212a parts of upper area, 212b parts of lower area, 213 parts of stirring module, 2131 parts of motor, 2132 parts of helical gear reducer, 2133 parts of stirring paddle, 214 parts of packing layer, 215 parts of baffle, 216 parts of first end cover, 217 parts of second end cover, 218 parts of baffle, 219 parts of mud scraping and sucking machine, 23 parts of filter pressing module, 231 parts of diaphragm pump, 232 parts of filter press, 3 parts of detection unit, 31 parts of PH meter, 32 parts of flowmeter, turbidity meter, 34 parts of liquid level meter.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the application.
It is to be understood that in the description of the present application, the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. The terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, i.e., features defining "first," "second," may explicitly or implicitly include one or more such features. Furthermore, unless otherwise indicated, the meaning of "a plurality" is two or more.
As shown in fig. 1-4, the recovery treatment device 100 for lithium battery positive electrode processing wastewater provided by one embodiment of the application comprises a collecting unit 1, a reaction unit 2 and a reaction unit, wherein the collecting unit 1 comprises a first storage tank 11 and a second storage tank 12, the first storage tank 11 is used for storing phosphorus-containing wastewater, the second storage tank 12 is used for storing lithium-containing wastewater, the reaction unit 2 comprises a tank body 21 and a filter pressing module 23, the tank body 21 comprises a reaction chamber 211 and a sedimentation chamber 212 which are communicated, a stirring module 213 is arranged in the reaction chamber 211, a horizontally arranged packing layer 214 and a vertically arranged partition plate 215 are arranged in the sedimentation chamber 212, one side of the packing layer 214 is connected with the partition plate 215, the partition plate 215 and the packing layer 214 divide the sedimentation chamber 212 into an upper area 212a and a lower area 212b, and when the sedimentation chamber 212 inputs wastewater, the lower area 212b passes through the packing layer 214 and then enters the upper area 212a and is discharged;
the detecting unit 3 comprises a PH meter 31, a flowmeter 32 and a turbidity meter 33, wherein the PH meter 31 is arranged in the reaction chamber 211, the flowmeter 32 is arranged in two and is respectively arranged at the outlet of the first storage tank 11 and the outlet of the second storage tank 12, and the turbidity meter 33 is arranged in the precipitation chamber.
Based on the arrangement, the first storage tank 11 is used for storing phosphorus-containing wastewater, the second storage tank 12 is used for storing lithium-containing wastewater, the two types of wastewater are wastewater generated in the process of processing the anode of the lithium battery, the reaction unit 2 comprises a tank body 21 and a filter pressing module 23, the two types of wastewater are mixed and react in the tank body 21, and the filter pressing module presses 23 to obtain a magnesium phosphate filter cake and a lithium phosphate filter cake, so that materials in the wastewater can be effectively recycled, residual materials of the wastewater are more fully utilized, and the wastewater recycling cost is reduced.
In one embodiment, the collecting unit 1 further comprises a first centrifugal pump through which the first reservoir 11 communicates with the reaction chamber 211 and a second centrifugal pump through which the second reservoir 12 communicates with the reaction chamber 211. The wastewater in the first and second tanks 11 and 12 can be stably transferred into the reaction chamber 211 of the first reaction unit by the first and second centrifugal pumps.
As shown in fig. 2, the cell body 21 further includes a first end cap 216 and a second end cap 217, the first end cap 216 being capped on the reaction chamber 211, and the second end cap 217 being capped on the settling chamber 212. The first end cover 216 and the second end cover 217 are arranged so that the wastewater in the reaction chamber 211 and the sedimentation chamber 212 does not leak out during the reaction.
Specifically, as shown in fig. 4, the stirring module 213 includes a motor 2131, a helical gear reducer 2132 and a stirring paddle 2133 connected in sequence, the helical gear reducer 2132 is installed on the upper portion of the first end cover 216, the stirring paddle 2133 is provided on the lower portion of the first end cover 216, so that the installation structure of the stirring module 213 is stable, when in operation, the starting motor 2131 is regulated by the helical gear reducer 2132, and the available output torque is increased without increasing the power consumption of the motor 2131, so that the stirring paddle 2133 can stir and mix the wastewater in the reaction chamber 211.
Optionally, a baffle 218 is mounted on the inner wall of the reaction chamber 211, and the baffle 218 is disposed around the outer circumference of the stirring paddle 2133. The baffle 218 has an anti-swirling effect, making the mixing of the wastewater more uniform.
In one embodiment, the tank 21 further includes a suction dredge 219, the suction dredge 219 being disposed on the second end cap 217. The scraping and sucking machine 219 is used for maintaining and cleaning the tank body 21 when the tank body 21 is not in use.
Specifically, the filler layer 214 is a honeycomb diagonal filler layer. The waste water can form a cyclone flow in the process of passing through the honeycomb inclined tube filler layer, so that a large amount of contact area is generated between the sediment and the liquid, and the sediment is quickly precipitated.
In one embodiment, the tank body 21 further comprises a liquid draining chamber 210, the liquid draining chamber 210 is communicated with the upper area 212a of the sedimentation chamber 212, wherein the liquid in the liquid draining chamber 210 of the first reaction unit flows into the reaction chamber 211 of the second reaction unit, the detection unit 3 further comprises a liquid level meter 34, the liquid level meter 34 is arranged in the liquid draining chamber 210, the liquid level meter 34 is used for detecting the liquid level of the liquid draining chamber 210, and the liquid level meter 34 can be further arranged in the first storage tank 11, the second storage tank 12 and the reaction chamber 211 according to actual requirements to measure the liquid level.
Another embodiment of the application provides a method for recycling and treating lithium battery anode processing wastewater, comprising:
The first storage tank 11 is used for collecting the phosphorus-containing wastewater, and the second storage tank 12 is used for collecting the lithium-containing wastewater, wherein the phosphorus-containing wastewater is generated in the process of preparing ferric phosphate, the ferric phosphate is usually synthesized by liquid phase reaction of ferrous sulfate, hydrogen peroxide and phosphoric acid under certain conditions, and wastewater with higher phosphorus content is generated in the reaction process. The lithium-containing wastewater is generated during the lithium-washing process, and the wastewater also contains magnesium ions.
The first storage tank 11 and the second storage tank 12 are started to convey the phosphorus-containing wastewater and the lithium-containing wastewater into the reaction chamber 211 of the first reaction unit, the stirring module 213 is started to obtain mixed wastewater, the pH value of the mixed wastewater is adjusted to 8-10 and then flows into the sedimentation chamber 212 of the first reaction unit, the mixed wastewater is filtered by the packing layer 214 in the sedimentation chamber 212 and is precipitated in the lower region 212b of the sedimentation chamber 212 to form magnesium phosphate, and the upper region 212a of the sedimentation chamber 212 is formed to filter the wastewater.
The upper region 212a of the sedimentation chamber 212 of the first reaction unit is opened to convey the filtered wastewater into the reaction chamber 211 of the second reaction unit, the stirring module 213 is started to adjust the PH value of the filtered wastewater to 11-13, the filtered wastewater flows into the sedimentation chamber 212 of the second reaction unit, the filtered wastewater is filtered by the packing layer 214 in the sedimentation chamber 212 to form lithium phosphate in the lower region 212b of the sedimentation chamber 212, clear water is formed in the upper region 212a of the sedimentation chamber 212 to be discharged, wherein after the clear water is discharged to the liquid discharge chamber 210, the PH value of the clear water is adjusted to 6-9 (optionally 7) by injecting acidic substances, and then the clear water is discharged.
As shown in FIG. 5, comparing the mass concentrations of lithium ion, magnesium ion and phosphate ion in solution at different pH values (lower mass concentration of the material indicates more precipitate in the solution), the pH is optionally adjusted to 9 when magnesium phosphate is formed by precipitation, and to 12 when lithium phosphate is formed by precipitation. Through the above steps, magnesium phosphate and lithium phosphate are respectively precipitated in the precipitation chambers 212 of the first and second reaction units.
In another embodiment, the diaphragm pumps 231 of the first and second reaction units are activated to deliver magnesium phosphate and lithium phosphate, respectively, to the filter press 232, where they are pressed to obtain a magnesium phosphate filter cake and a lithium phosphate filter cake. The membrane pump 231 is a pneumatic membrane pump, the filter press 232 is a membrane filter press, and the wastewater formed by the membrane filter press of the first reaction unit and the second reaction unit after the pressure filtration operation is correspondingly conveyed into the settling chamber 212 of the first reaction unit and the second reaction unit for reuse.
In another embodiment, the pH adjustment of the mixed wastewater and the filtered wastewater is performed by means of an injection of liquid alkali.
The foregoing is merely a preferred embodiment of the present application, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present application, and these modifications and substitutions should also be considered as being within the scope of the present application.
Claims (10)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2023/118700 WO2025054876A1 (en) | 2023-09-14 | 2023-09-14 | Lithium battery positive electrode processing wastewater recovery and treatment apparatus and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117480128A CN117480128A (en) | 2024-01-30 |
| CN117480128B true CN117480128B (en) | 2025-09-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202380010739.8A Active CN117480128B (en) | 2023-09-14 | 2023-09-14 | A device and method for recycling wastewater from lithium battery positive electrode processing |
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| CN (1) | CN117480128B (en) |
| WO (1) | WO2025054876A1 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207121501U (en) * | 2017-08-22 | 2018-03-20 | 山东神华山大能源环境有限公司 | A kind of hardness removing device suitable for the hard waste water of high magnesium |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US6818131B2 (en) * | 2002-10-02 | 2004-11-16 | Taiwan Semiconductor Manufacturing Co., Ltd. | System and process for CU-CMP wastewater treatment |
| JP2011031153A (en) * | 2009-07-31 | 2011-02-17 | Kuraray Co Ltd | Ion recovery method and apparatus |
| US20110168550A1 (en) * | 2010-01-13 | 2011-07-14 | Applied Materials, Inc. | Graded electrode technologies for high energy lithium-ion batteries |
| JP6508675B2 (en) * | 2015-03-16 | 2019-05-08 | 地方独立行政法人 岩手県工業技術センター | Recovery method of iron phosphate |
| CN105417771B (en) * | 2015-11-20 | 2017-12-12 | 上海世渊环保科技有限公司 | Ferric phosphate produces the denitrogenation dephosphorizing and resource recovery process and equipment of waste water |
| CN206457345U (en) * | 2017-02-08 | 2017-09-01 | 佛山市新泰隆环保设备制造有限公司 | The recycling recovery system of phosphoric acid iron waste water and phosphorus and ammonia nitrogen |
| KR101944522B1 (en) * | 2018-07-31 | 2019-02-01 | 한국지질자원연구원 | Manufacturing method of high-concentration lithium solution from lithium phosphate |
| CN109775678B (en) * | 2019-04-01 | 2022-05-10 | 中钢集团南京新材料研究院有限公司 | Method for preparing battery-grade iron phosphate and industrial-grade lithium phosphate from waste lithium iron phosphate batteries |
| CN210394009U (en) * | 2019-07-18 | 2020-04-24 | 青岛世创环境工程有限公司 | Integrated acid pickling phosphating sewage treatment equipment |
| CN112357899B (en) * | 2020-11-23 | 2022-04-22 | 湖南金源新材料股份有限公司 | Comprehensive recycling method of waste lithium iron phosphate batteries |
| CN114671556B (en) * | 2022-03-23 | 2022-12-09 | 生态环境部南京环境科学研究所 | A high-efficiency treatment system and process for waste acid sewage in copper smelting engineering |
| CN114988382B (en) * | 2022-06-16 | 2023-08-25 | 蜂巢能源科技股份有限公司 | A kind of recycling method of waste lithium iron phosphate battery powder |
| CN115340240B (en) * | 2022-08-24 | 2023-06-16 | 广东邦普循环科技有限公司 | Comprehensive treatment method for nickel-cobalt-manganese ternary lithium battery wastewater |
| CN218435365U (en) * | 2022-09-01 | 2023-02-03 | 屏南时代新材料技术有限公司 | Ternary cathode material waste water recovery system |
| CN115536047A (en) * | 2022-11-11 | 2022-12-30 | 神华准能资源综合开发有限公司 | Utilize lithium-containing waste water to prepare the method for lithium carbonate |
-
2023
- 2023-09-14 CN CN202380010739.8A patent/CN117480128B/en active Active
- 2023-09-14 WO PCT/CN2023/118700 patent/WO2025054876A1/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207121501U (en) * | 2017-08-22 | 2018-03-20 | 山东神华山大能源环境有限公司 | A kind of hardness removing device suitable for the hard waste water of high magnesium |
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| WO2025054876A1 (en) | 2025-03-20 |
| CN117480128A (en) | 2024-01-30 |
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